"The U.S. Postal Service is seeking to increase the price of its first-class mail forever stamp in the biggest price hike since 1991.

The USPS board of governors requested a 5 cent increase to the forever stamp, up to 55 cents. Before recalculating the cost of sending those wedding invitations, USPS said the change would also reduce the additional ounce price of letters. So, a 2-ounce stamped letter would decrease from 71 cents to 70 cents, according to a statement."